/* eslint-disable no-undef */
const counter = Vue.component('counter', {
    data () {
        return { count: 0 }
    },
    mounted () {
        console.log('Counter Mounted');
    },
    template: '<button v-on:click="count++">点击计算点击次数：{{count}}次</button>'
});
console.log(counter)
console.log(counter instanceof Vue)